Timer



A. PAlAuc.

TIMER. APPLICATION FILED SEPT- 5| I920.

' Patented Nov. 7, 1922.

Patented Nov. 7, 1922.

UNITED STATES ANTONIO PAJ'ALIC, OF DETROIT, MICHIGAN.

TIMER.

Application filed September 15, 1920. Serial No. 410,377.

To all whom it may concern Be it known that I, AN'roNIo PAJALIC, a citizen of the United States, and a resident of Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Timers, of which the following is a specification.

My invention is an improvement in timers.

An important object of my invention is to provide a device of the above mentionedv character which is positive in operation and insures the firing of the spark plugs of an internal combustion engine, at the proper instant.

Another important object is to provide a timer which consists of few parts and which may be easily disassembled for the purpose of renewing worn parts.

A further object is to provide a timer which is extremely simple in construction and inexpensive to manufacture.

Other objects and advantages will become apparent during the course of the following description.

In the drawings forming a part of this specification and in which like numerals are employed to designate like characters throughout the same,

Figure 1 is a front elevation ofmy invention,

Figure 2 is a side view of the body portion of the device,

Figure 3 is a. perspective view of the contact tensioning spring,

Figure 4 is a side elevation of the pin,

Figure 5 is a plan view of the pin, and

Figure 6 shows the device in operative position within the commutator.

My improved timer comprises a casing 10 of insulating material provided with a series of exposed arcuate contacts 11 embedded on its inner face. These contacts extend through the casing and form terminals 12, for connection with the primary circuits of separate induction coils (not shown).

A carrier 13 is rigidly mounted upon a shaft 14 geared to the main engine shaft (not shown). The carrier 13 is provided with arms 15 arranged on one side of its axis of rotation, said arms having alined keyhole slots 16, and apertured arms 17 arranged on the opposite side of the axis of rotation.

A loop spring 18 having its ends overlapping as shown more particularly in Figure 3, is provided near one of its ends with apertured ears 19 projecting upwardly and in alinement with each other. The spring 18 is also provided with downwardly projecting apertured ears 20 formed on the lower half of the loop.

The spring is placed in position as shown in Figure 1, the lower portion being securely held between the arms 17 by the bolt 21. The upper portion of the spring is disposed between the arms 15 and carries a roller contact 22 mounted upon an axle 23. This axle is supported by the cars 19 of the spring 18, and is guided in its radiai movement by the keyhole slot 16 through which the heads 24 of the axle pass.

In operation, wires from. the primary circuits of induction coils are connected to the terminals 12. When the shaft 14. rotates the contact roller 22 passes over the contacts 11 and thus completes the circuits through the several induction coils and ground. It will be seen that the action of the loop spring 18 tends to keep the roller normally in contact with the inner face of the casing 10. The keyhole slot functions as a guide to the axle 23 and confines the same to radial movement only. Thus accurate firing of the spark plugs is assured.

It is to be understood that various changes in the size, shape and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims.

I claim 1. In a device substantially as described, a contact, a revolving carrier therefor, and a loop spring actuating the contact and having ears facllitating its connection with the revolving carrier.

2. A commutator having a revolving carrier, a contact guided thereby, and a loop spring carried by the revolving carrier and actuating the contact, said spring having its ends overlapping and ears formed near one of its ends for connection with the revolving carrier.

3. In a device of the character described a casing, and a rotary carrier comprising a loop spring having its extremities overlapping, and a roller contact carried by one of said extremities for distributing electric current to the casing.

4. In a device of the character described, a loop spring having its ends overlapping upwardly projecting ears provided near one ears formed near one end of the support of the ends of the spring, and downwardly for carrying the roller contact. projecting ears formed on the main body 6. In a device of the character described 10 portion of the spring all as and for the a roller contact a resilient support haying 5 purpose set forth. its ends overlapping, and guiding means for 5. In a device of the character described confining the contact to a radial movement. a roller contact, a resilient support and ANTONIO PAJALIC. 

